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- W1990627399 abstract "Simultaneous transmission to multiple users using orthogonal beamforming, known as space-division multiple-access (SDMA), is capable of achieving very high throughput in multiple-input multiple-output (MIMO) broadcast channel. In this paper, we propose a new orthogonal beamforming algorithm to achieve high capacity performance in MIMO broadcast channel. In the proposed method, the base station generates a unitary beamforming vector set using Gram-Schmidt orthogonalization. We extend the algorithm of opportunistic SDMA with limited feedback (LF-OSDMA) to guarantee that the system never loses multiplexing gain for fair comparison with the proposed method by informing unallocated beams. We show that the proposed method can achieve a significantly higher sum capacity than LF-OSDMA and the extended LF-OSDMA without a large increase in the amount of feedback bits and latency." @default.
- W1990627399 created "2016-06-24" @default.
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- W1990627399 date "2011-07-18" @default.
- W1990627399 modified "2023-09-23" @default.
- W1990627399 title "Orthogonal beamforming using Gram-Schmidt orthogonalization for multi-user MIMO downlink system" @default.
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- W1990627399 doi "https://doi.org/10.1186/1687-1499-2011-41" @default.
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